NUCLEO-U545RE-Q评测 (3)驱动OLED

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wenyangzeng 发布时间：2023-11-9 14:29

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文章简介:	NUCLEO-U545RE-Q评测 (3)驱动OLED

NUCLEO-U545RE-Q连接OLED显示屏的接线见下图：

打开STM32CubeMX，新建一个工程，选择STM32U545RE-Q。

设置系统时钟源MSIS,频率160MHZ，

配置驱动OLED的GPIO引脚

添加OLED驱动代码，编译、下载、运行：

部分代码


void LCD_Init(void)  
{
 LCD_SCL_SET();
 LCD_RST_CLR();
 HAL_Delay(500);
 LCD_RST_SET();
 LCD_WrCmd(0xae);//--turn off oled panel
  LCD_WrCmd(0x00);//---set low column address
  LCD_WrCmd(0x10);//---set high column address
  LCD_WrCmd(0x40);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
  LCD_WrCmd(0x81);//--set contrast control register
  LCD_WrCmd(0xcf); // Set SEG Output Current Brightness
  LCD_WrCmd(0xa0);//--Set SEG/Column Mapping     0xa0左右反置 0xa1正常
  LCD_WrCmd(0xc0);//Set COM/Row Scan Direction   0xc0上下反置 0xc8正常
  LCD_WrCmd(0xa6);//--set normal display
  LCD_WrCmd(0xa8);//--set multiplex ratio(1 to 64)
  LCD_WrCmd(0x3f);//--1/64 duty
  LCD_WrCmd(0xd3);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
  LCD_WrCmd(0x00);//-not offset
  LCD_WrCmd(0xd5);//--set display clock divide ratio/oscillator frequency
  LCD_WrCmd(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec
  LCD_WrCmd(0xd9);//--set pre-charge period
  LCD_WrCmd(0xf1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
  LCD_WrCmd(0xda);//--set com pins hardware configuration
  LCD_WrCmd(0x12);
  LCD_WrCmd(0xdb);//--set vcomh
  LCD_WrCmd(0x40);//Set VCOM Deselect Level
  LCD_WrCmd(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02)
  LCD_WrCmd(0x02);//
  LCD_WrCmd(0x8d);//--set Charge Pump enable/disable
  LCD_WrCmd(0x14);//--set(0x10) disable
  LCD_WrCmd(0xa4);// Disable Entire Display On (0xa4/0xa5)
  LCD_WrCmd(0xa6);// Disable Inverse Display On (0xa6/a7) 
  LCD_WrCmd(0xaf);//--turn on oled panel
  LCD_Fill(0x00);  //初始清屏
  LCD_Set_Pos(0,0);  
} 


int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_MEMORYMAP_Init();
  MX_ICACHE_Init();
  LCD_Init();
  LCD_Print(16, 0,"STM32U545RE ",TYPE16X16,TYPE8X16);
  LCD_Print(32, 16, "NUCLEO",TYPE16X16,TYPE8X16);
  while (1)
  {
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
  {
    Error_Handler();
  }
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
  RCC_OscInitStruct.MSIState = RCC_MSI_ON;
  RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_0;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
  RCC_OscInitStruct.PLL.PLLMBOOST = RCC_PLLMBOOST_DIV4;
  RCC_OscInitStruct.PLL.PLLM = 3;
  RCC_OscInitStruct.PLL.PLLN = 10;
  RCC_OscInitStruct.PLL.PLLP = 2;
  RCC_OscInitStruct.PLL.PLLQ = 2;
  RCC_OscInitStruct.PLL.PLLR = 1;
  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLLVCIRANGE_1;
  RCC_OscInitStruct.PLL.PLLFRACN = 0;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
                              |RCC_CLOCKTYPE_PCLK3;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
  {
    Error_Handler();
  }
}